Turn to any page of St. Faustina’s Diary, and you’ll find spiritual gems, like this one: Thursday. Although I was very tired today, I nevertheless resolved to make a Holy Hour. I could not pray, nor could I remain kneeling, but I remained in prayer for a whole hour and united myself in spirit with those souls who are already worshiping God in the perfect way. [Then Jesus said to me,] Your prayer is extremely pleasing to Me (Diary, 691).

Jesus said we must “pray always without becoming weary” (Lk 18:1). But how can we truly pray without ceasing? The answer lies in the Holy Sacrifice of the Mass — the most perfect and continuous prayer on earth. At every moment of every day, somewhere in the world, the Mass is being offered. Humanity never ceases to pray because the Church never ceases to worship.

The readings for this homily: https://bible.usccb.org/bible/readings/122425.cfm